Revise README for v2 legacy version and cleanup

Updated README to reflect the v2 legacy version and removed contributing section.

Author: crazywhalecc

README.md

@@ -1,7 +1,7 @@
-# :warning: **This repo content has moved to [static-php-cli](https://github.com/crazywhalecc/static-php-cli) docs dir!!!**
+# :warning: **This repo content is v2 legacy version!!!**
 
-# static-php-cli-docs
-[static-php-cli](https://github.com/crazywhalecc/static-php-cli) Documentation, use VitePress.
+# v2-docs
+[static-php-cli](https://github.com/crazywhalecc/static-php-cli) Documentation for 2.x version, use VitePress.
 
 ```bash
 # Install dependencies
@@ -13,9 +13,6 @@ yarn docs:dev
 # Build mode, target: docs/.vitepress/dist/
 yarn docs:build
 ```
+## Note
 
-## Contributing
-
-You can directly edit this file and create a PR, I will review it ASAP.
-
-**Note: If you only know only one language, you can update the content in only one language and I will translate it before merging it.**
+v3 docs is in [StaticPHP](https://github.com/crazywhalecc/static-php-cli) source tree.